Of course, I know that. Not all jokes are there to elicit laughs --unless one is a clown or a stand-up comedian. It's a joke in the sense that it's not meant seriously.
As, in, if somebody DID kill himself following his advice, Linus would be genuinely upset, sad, and most of all surprised.
Telling someone to commit suicide, even if not meant literally, because of a technical disagreement, should not be (in my opinion) considered acceptable in any culture. Unless it's just an established colloquialism of everyday speech, as maybe it is for Finns. I don't think that should be brought to other cultures.
Representative Joseph Cao said to BP America CEO Lamar McKay: "Mr. Stearn asked Mr. McKay to resign. In the Asian culture we do things differently. During the Samurai days, we would just give you a knife and ask you to commit Hari-Kari."
Glenn Beck: "There's not enough knives. If this, if the IPCC had been done by Japanese scientists, there's not enough knives on planet Earth for hara-kiri that should have occurred. I mean, these guys have so dishonored themselves, so dishonored scientists."
I believe the difference is that, in the US, suicide has a strong association with moral and internal failings, while 'hari kari' is associated with honor despite external failure.
In either case, and as you rightly point out, this is your own opinion. It does not appear to be outside the pale to the US at large, else the above two quotes would have been major reports.
As someone who has depression and a past history of suicidal thoughts, you insult me by suggesting I can't tell the difference between a turn of phrase and someone genuinely wishing I was dead.
I did. Have you? Definition #2 from Mirriam-Webster: "something not to be taken seriously".
Telling someone to commit suicide, even if not meant literally, because of a technical disagreement, should not be (in my opinion) considered acceptable in any culture.
You know what they say about opinions. Lots of people the world over enjoy the occasional colorful comment, and do not get their knickers tied up in a knot (UK-ism meaning they are not annoyed) when non PC language is used. Hell, lots of cultures the world over think political correctness itself as silly and/or prudish.